Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

Science > Current, Voltage & Ammeters > Flashcards

Current, Voltage & Ammeters Flashcards

You may prefer our related Brainscape-certified flashcards:
Biology 101 flashcards
1
Q

What is a current

A

The amount of charge flowing per second

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

What units is current measured in

A

Amps

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

What equipment can you use to measure current

A

Ammeters

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

How can a loop of string be used to model a current

A

Rope presents the charges and the amount of rope moving per second is the current

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

What is the job of a cell / battery in a circuit

A

They push charges around the circuit

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

State some examples of circuit components

A

Bulb
Buzzer
Motor
Resistor

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

What is meant by potential difference

A

The push that makes a charge move around a circuit

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

What unit is potential difference measured in

A

Volts

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

What equipment can be used to measure potential difference

A

Voltmeter

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

How do you measure the potential difference of a power supply

A

Connect the voltmeter around the battery

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

How do you measure the potential difference of a component

A

Connect the voltmeter around the component

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

What happens to the potential difference in a series circuit

A

Total potential difference of components equals the potential difference of the power supply

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

What happens to the potential difference in a parallel circuit

A

The potential difference is the same across each loop

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

What happens to the current in a series circuit

A

It is the same all the way around the circuit

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

What happens to the current in a parallel circuit

A

It splits up at the junction

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

What is the difference between a series and a parallel circuit

A

A series has one loop whereas a parallel has more than one loop

17
Q

How could you represent a parallel circuit using a model

A

Hold more than one loop of rope so the battery moves at the same time

18
Q

What does a resistor do

A

It slows down the current

19
Q

What is resistance

A

How easy or hard it is to let the current through

20
Q

What is resistance measured in

A

Ohms

21
Q

What equation can be used to calculate resistance

A

Resistance = Potential Difference ÷Current

22
Q

What do the Electrons do ad they move through a wire

A

They collide with the atoms

23
Q

What does Elctrons moving through wires cause

A

It causes the wire to heat up and the Electrons lose energy

24
Q

What is meant by an electrical conductor

A

Something that has low resistance and let’s a lot of electricity through easily

Science (17 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions